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A217952 Number of n element 0..3 arrays with each element the minimum of 6 adjacent elements of a random 0..3 array of n+5 elements 1
4, 16, 50, 130, 296, 610, 1163, 2097, 3670, 6434, 11666, 22313, 44907, 93206, 194831, 403141, 818641, 1628770, 3184993, 6157786, 11854873, 22877202, 44459405, 87168326, 172249773, 342083954, 680463827, 1351826291, 2677343192, 5283369867 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A217954

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 4*a(n-1) -6*a(n-2) +4*a(n-3) -a(n-4) +6*a(n-7) -4*a(n-8) +6*a(n-9) +4*a(n-10) +5*a(n-11) +6*a(n-12) +7*a(n-13) +3*a(n-14) +5*a(n-15) +4*a(n-16) +3*a(n-17) +2*a(n-18) +a(n-19)

EXAMPLE

Some solutions for n=4

..0....0....1....1....0....3....1....0....0....2....0....2....2....1....2....3

..3....0....2....3....1....3....2....1....0....2....2....2....3....2....2....2

..3....3....3....3....3....2....3....1....1....1....1....2....0....2....3....1

..3....2....1....0....3....2....2....0....2....0....0....2....0....1....3....1

CROSSREFS

Sequence in context: A271483 A223659 A217953 * A217951 A217950 A217949

Adjacent sequences:  A217949 A217950 A217951 * A217953 A217954 A217955

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 15 2012

STATUS

approved

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Last modified May 11 03:49 EDT 2021. Contains 343784 sequences. (Running on oeis4.)